Blizzard announced today that the forthcoming Wrath of the Lich King expansion will be published by The9 in mainland China, and Soft-World in Taiwan, Hong Kong, and Macau. The9 and Soft-World have brought both the original WoW and Burning Crusade to their respective regions, so it's not surprising that they'll be handling Wrath as well. Release dates, of course, are still TBA, there as here.
However, if there's one thing I like to do, it's speculating based on insufficient data. The agreement with Soft-World to carry BC appears to have been made just a month before BC's January 2007 launch in North America and Europe. So if Wrath follows this pattern, it will be out next month. On the other hand, the agreement with The9 to carry BC in mainland China was made in February 2007, a month after BC came out here, so if this holds true for Wrath as well, we should have been hitting Northrend a month ago. Either one of these is pretty unlikely; maybe there's not much information to be gleaned from this announcement after all (aside from that WoW is still doing well in Asia).